The New Ranging Signal Design for GNSS Based Zadoff-Chu Seqeuence and OFDM Modulation

J. Lee, J. Kim, S. Han, K-J. Kim, K-W. Song, J.M. Ahn

Abstract:	In ranging signals used in the Global Navigation Satellite System (GNSS), spectrum shape which reducing Out-Of-Band (OOB) emission is important in terms of Spectral Separation Coefficient (SSC). A ranging signal generation based on Orthogonal Frequency Division Multiplexing (OFDM) modulation is enhanced in terms of spectrum shape. But, it has a problem of Peak-to-Average Power Ratio (PAPR). The Zadoff-Chu sequence, generated by OFDM modulation, is better PAPR than random signals. However, it has a still high PAPR. We propose the ranging signal of GNSS based on OFDM. By applying soft-clipping method, the proposed signal maintains the PAPR to the appropriate levels, and is able to shape a desired spectral shape. Simulation results show that the proposed method is capable of minimizing sidelobe regrowth and having the same correlation performance.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	1720 - 1725
Cite this article:	Lee, J., Kim, J., Han, S., Kim, K-J., Song, K-W., Ahn, J.M., "The New Ranging Signal Design for GNSS Based Zadoff-Chu Seqeuence and OFDM Modulation," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 1720-1725.
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